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Chesapeake Bay weather for February 4: freezing rain advisory tonight

National Weather Service forecast map
National Weather Service forecast map
Map courtesy National Weather Service

Brian's exclusive forecast for Baltimore, Annapolis, and northern Delmarva:

*The National Weather Service at Baltimore/Washington has issued a Freezing Rain Advisory for tonight and early Wednesday morning*

This afternoon: Sunny early, then increasing clouds. Cold with a high from 30 to 35.

Tonight: Cloudy with freezing rain developing, then changing to rain. Ice accretion up to 1/10" expected in the Annapolis area. The low will be near 30.

Wednesday: Morning rain showers, then mostly cloudy. The high will be around 40.

Wednesday Night: Mostly clear with a low in the upper 20s.

Thursday: Mostly sunny, breezy, and cold with a high around 35.

The extended outlook calls for a mostly sunny day on Friday with a low near 25 and a high around 35. Clouds and sun on Saturday with a low in the upper 20s and a high in the upper 30s. Increasing clouds with a chance of snow or mixed precipitation on Sunday. The low will be in the upper 20s and the high will be in the upper 30s.

The National Weather Service at Sterling, VA has issued a Freezing Rain Advisory for Annapolis, Baltimore, and Washington effective tonight and early Wednesday morning. After morning sunshine, increasing clouds this afternoon will give way to freezing rain later in the evening. High pressure to our north will funnel cold air down the coastal plain tonight, and a southerly flow around low pressure will bring warm air aloft. As precipitation falls into the shallow layer of cold air at the surface, rain will freeze upon impact. The effect of "cold air damming" will result in a period of freezing rain through Wednesday morning. To the north, more significant icing is expected to occur. As a result, a Winter Storm Warning is in effect for areas to the north and west of Baltimore and Washington. Temperatures will gradually rise above freezing by early Wednesday morning and all precipitation will change to rain showers; however, icy conditions may be present around the area during the morning rush depending on the time of the changeover from freezing rain to rain. Our weather improves on Thursday and Friday with plenty of sunshine; however, temperatures will be cold with lows in the 20s and highs in the 30s. Unsettled weather returns to the Middle Atlantic region this weekend with a chance of rain or snow showers on Saturday, and a chance of more significant winter precipitation by Sunday evening.

On the Maryland portion of Chesapeake Bay, no advisories are currently in effect. Winds on Tuesday will come out of the northeast at 5 knots with waves less than one foot in ice-free waters. Winds on Tuesday night will come out of the east at 5 knots with waves less than one foot in ice-free waters. Visibility may be reduced in freezing rain, rain, and fog. Winds on Wednesday will come out of the west at 10 knots, becoming northwest late in the day. Waves will range from 1 to 2 feet in ice-free waters. Winds on Wednesday night will come out of the northwest at 10 to 15 knots with gusts over 20 knots and waves from 1 to 2 feet. Winds on Thursday will come out of the northwest at 10 knots with waves around one foot. Boaters should prepare for icy conditions on the bay. Marine information is provided as general guidance. Boaters should always stay tuned to the latest forecasts and advisories from the National Weather Service.

The average high temperature for February 4 is 43 degrees and the average low is 25 degrees. The records at Baltimore on this date are 72 degrees in 1991 and 5 degrees in 1918. Today's sunrise will occur at 7:10 and the sunset will occur at 5:31. Weather data courtesy of the National Weather Service. For more weather updates, please visit my Chesapeake Bay Weather page on Facebook, and if you're heading to Ocean City feel free to check out my Ocean City MD Weather page on Facebook. You can also follow me on Twitter @chesbayweather.

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